Did you notice if you were losing traction at all? I've noticed that If the car detects any sort of wheel spin it will not shift as fast. Since you increased the power there is a good chance you are losing traction.,
Yeah doesn't hurt to check. They could have snipped the zip tie before installing it and simply placed the DP down to roughly and it could have popped out.
I can't recall if it was already mentioned in this thread but did you make sure the gasket was installed in between the DP and turbo housing?? A lot of people miss it because it sits inside the DP flange.
Literally just because it's HKS
I personally think the 3D Maxpider mats are ugly, as are pretty much most all weather mats.
I already have Weathertechs for the winter time. I got these because I like HKS and prefer nice plush carpet floormats for the other 3 seasons.
Anywhere from like 1800 - 2500 rpm under any sort of load the exhaust would boom inside the cabin. At first I was able to deal with it, but it got to me over time. I experienced this with both my stock DP and my AA catted DP. It wasn't like Honda straight piped fart can levels of brain rattling...